How to Build a Dungeon: Book of the Demon King #4

The fourth volume of this dark fantasy comedy series continues the story of Aur, a young man reborn as a demon king who must construct a dungeon and manage its monstrous inhabitants. This installment follows his ongoing efforts to expand his domain and deal with the challenges posed by adventurers and rival supernatural forces. The volume collects the latter half of the manga's original Japanese release, advancing the series' blend of dungeon-building strategy and ecchi humor.